Extended Data Fig. 9: Emission spectra of isolated plasmonic LPs.
From: Half-wave nanolasers and intracellular plasmonic lasing particles
a, SEM image of a semiconductor particle after electron-beam gold deposition. The deposited gold layer appears noticeably rougher that the ‘ultra-flat’ gold substrate shown in Extended Data Fig. 2f. b, SEM images of samples with a gold thickness of 100 nm and a side length of 580 nm. c, Emission spectra at varying pump fluences. d, Light-in-light-out curves measured (circles) along with a theoretical fit (red curve). e, Output spectra of 4 LPs. f, Evolution of output spectra of two LPs at pump fluences varying from 0.1 to 4 mJ/cm2. The Q factor of the fourth-order longitudinal mode in these devices is estimated to be 42. g, SEM images of two samples after gold deposition with a thickness of 15 nm. h, Output spectra of two thin-gold-coated samples. The Q factor of the fourth-order mode in these devices is estimated to be approximately 30.
